Removable valve-seat.



n. 67mm.

E. n. MERRILL..

BEMUVABLE VALVE SEAT.

(gplicggon mod Nov. Q4, 1900.)

Patented July 9, lm.

(llo Imm.)

w: Noam: PETERS cc.. vnofoumo, wAsmNuTcN. n cA f UNrTnD'STATEs PATENT OFFICE,

ELIJAII H. MERRILL, yOl? SAN FRANCISCO, CALIFORNIA.

`ulalvlovAeLri VALVE-SEAT.

SPECIFICATION forming part of Letters Patent No. 678,014, dated July 9, 1901.-

Application iiled November 24, 1900. Serial No. 37,606. (No model.)

To @ZZ whom it may concern:

Beit known that I, ELIJAH H. MERRILL, a citizen of the United States, residing in the city and county of San Francisco, State of California,have invented an Improvement in Removable Valve-Seats and I hereby declare the following to be a full, clear, and exact description of the same.

My invention relates to-improvements in gates or similar devices for the control of the iiow of liquids. Y

It consists of the parts and the constructions and combinations of parts hereinafter described and claimed.

Figure 1 is "a vertical section through the rvalve-casing. Fig. 2 is a similar detail view of seat and its connections. Fig. 3 is a face view of the seat.

It is intended particularly for use in gates controlling the flow of water in which is contained a great deal of sediment and where the wear upon the valve and valve-seat is consequently very great and where it is necessary from time to time to grind down or renew either of the contacting faces of these two parts .to prevent leakage.

The object of my invention is to provide a seat that offers a broad bearing or supporting surface for the valve and that is readily removable and replaceable whenever the faces of either it or the valve become so worn as to needredressingorchange. Ordinarilytheend of the pipe or pipe-section itself is used as a valve-seat, which on account of its thinness soon wears away and it is necessary to take the whole section to be reground, or when it is worn out the whole section must be thrown away,occasioning a considerable loss of metal. By providing a thickened and removable ring on this section regrinding is not so frequently necessary and a new valve-seat can be inserted whenever desired at a small loss of metal in the old seat.

Having reference to the drawings, A represents the casing of a valve-chamber with an opening 2, in' which is a short pipe-section B. This section has an annular flange 3, by which it is secured to the casing, as-by bolts 4, making a water-tight joint. 5 is the conductingpipe. Upon the inner end of this section is the valve-seat C, so attached as to be removable when desired. This valve-seat is a ring considerably thicker than the pipe-section and may be screwed upon the outside or the inside of the section B, but leaving a large flange portion c over-the end of the section. The interior of the seat is grooved horizontally', as at 6, for the engagement of a key or wrench by whichthe ring is screwed on or off. A valve D upon a stem 7 slides upon the face of this valve-seat. One object of the thick'- ened flange portion c, aside from the fact of having a surface that will notlwear away so rapidly, is to offer a broad supportvfor the Valve. With the outlowing water under heavy pressure the strain on the valve as it is moved across the opening in the pipe-sec tion is very great and there is a tendency to Vibration, particularly where there is only the thin edge of the pipe or pipe-section serva ing as a seat. This vibration is entirely ob- Viated and the strain greatly reduced in my device. The opening in the casing A is of a diameter corresponding to the outside diameter of the valve-seat, permitting the ready insertion or removal of the section and seat; In order that these parts may be properly su pported, I provide iianges d, which t the sides of the opening in the casing and which pre vent any possible vibration or displacement. Whenever it is desired to remove and re grind or replace the valve-seat, the bolts 4 are loosened and the pipe-section taken out, the valve-seat unscrewed, and the desired change made, or the valve and valve-seatmay be reached and changed by removing the hood a, of the casing by means of the bolts 8.

Having thus described my invention, what -I claim as new, and desire to secure by Letters Patent, is;-

1.. The combination with a casing, an openL ing in this casing, a pipe-section in this opening, means by which this section is removably.

secured t0 the casing, a ring fitting the inner end of this section, and having a iiange portion of greater thickness than the pipe-section, said flange adapted to extend over the edge of the pipe-section and forming'a valve-seat, means by which this ring may be removed from the pipe-section and a valve engaging said lvalve-seat.

42. The combination with a casing, a pipeL section entering the same and means where'- by the pipe-section is detachably secured to Ico the casing, a valve, a ring detaohably fitted opening of sufficient size to admit the pipe to the end of the pipe-section and having a section and its ring. 1o flanged face portion of greater diameter than In witness 'whereof I have hereunto set my the pipeseetion, adapted to extend over` the hand.

edge of the pipe-section and form a valve-seat ELU AH H. MERRILL. and extended bearing, said ring having inte- Witnesses: rior grooves Which may be engaged by a tool S. H. NOURSE,

to detach the ring, and Isaid easing having an JESSIE C. BRODIE. 

